Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 142 insertions, 0 deletions

diff --git a/man/timesyncd.conf.xml b/man/timesyncd.conf.xml
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+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
+
+<refentry id="timesyncd.conf" conditional='ENABLE_TIMESYNCD'
+    xmlns:xi="http://www.w3.org/2001/XInclude">
+  <refentryinfo>
+    <title>timesyncd.conf</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>timesyncd.conf</refentrytitle>
+    <manvolnum>5</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>timesyncd.conf</refname>
+    <refname>timesyncd.conf.d</refname>
+    <refpurpose>Network Time Synchronization configuration files</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <para><filename>/etc/systemd/timesyncd.conf</filename></para>
+    <para><filename>/etc/systemd/timesyncd.conf.d/*.conf</filename></para>
+    <para><filename>/run/systemd/timesyncd.conf.d/*.conf</filename></para>
+    <para><filename>/usr/lib/systemd/timesyncd.conf.d/*.conf</filename></para>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para>These configuration files control NTP network time synchronization. See
+    <citerefentry><refentrytitle>systemd.syntax</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+    for a general description of the syntax.</para>
+  </refsect1>
+
+  <xi:include href="standard-conf.xml" xpointer="main-conf" />
+
+  <refsect1>
+    <title>Options</title>
+
+    <para>The following settings are configured in the [Time] section:</para>
+
+    <variablelist class='network-directives'>
+
+      <varlistentry>
+        <term><varname>NTP=</varname></term>
+        <listitem><para>A space-separated list of NTP server host names or IP addresses. During runtime this
+        list is combined with any per-interface NTP servers acquired from
+        <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
+        <command>systemd-timesyncd</command> will contact all configured system or per-interface servers in
+        turn, until one responds. When the empty string is assigned, the list of NTP servers is reset, and
+        all prior assignments will have no effect. This setting defaults to an empty list.</para>
+
+        <xi:include href="version-info.xml" xpointer="v216"/></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>FallbackNTP=</varname></term>
+        <listitem><para>A space-separated list of NTP server host names or IP addresses to be used as the
+        fallback NTP servers. Any per-interface NTP servers obtained from
+        <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+        take precedence over this setting, as do any servers set via <varname>NTP=</varname> above. This
+        setting is hence only relevant if no other NTP server information is known. When the empty string is
+        assigned, the list of NTP servers is reset, and all prior assignments will have no effect. If this
+        option is not given, a compiled-in list of NTP servers is used.</para>
+
+        <xi:include href="version-info.xml" xpointer="v216"/></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>RootDistanceMaxSec=</varname></term>
+        <listitem><para>Maximum acceptable root distance, i.e. the maximum estimated time required for a
+        packet to travel to the server we are connected to from the server with the reference clock. If
+        the current server does not satisfy this limit, <command>systemd-timesyncd</command> will switch
+        to a different server.</para>
+
+        <para>Takes a time span value. The default unit is seconds, but other units may be specified, see
+        <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+        Defaults to 5 seconds.</para>
+
+        <xi:include href="version-info.xml" xpointer="v236"/></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>PollIntervalMinSec=</varname></term>
+        <term><varname>PollIntervalMaxSec=</varname></term>
+        <listitem><para>The minimum and maximum poll intervals for NTP messages. Polling starts at the
+        minimum poll interval, and is adjusted within the specified limits in response to received packets.
+        </para>
+
+        <para>Each setting takes a time span value. The default unit is seconds, but other units may be
+        specified, see
+        <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+        <varname>PollIntervalMinSec=</varname> defaults to 32 seconds and must not be smaller than
+        16 seconds. <varname>PollIntervalMaxSec=</varname> defaults to 34 min 8 s (2048 seconds) and must be
+        larger than <varname>PollIntervalMinSec=</varname>.</para>
+
+        <xi:include href="version-info.xml" xpointer="v236"/></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>ConnectionRetrySec=</varname></term>
+        <listitem><para>Specifies the minimum delay before subsequent attempts to contact a new NTP server
+        are made.</para>
+
+        <para>Takes a time span value. The default unit is seconds, but other units may be specified, see
+        <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+        Defaults to 30 seconds and must not be smaller than 1 second.</para>
+
+        <xi:include href="version-info.xml" xpointer="v248"/></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>SaveIntervalSec=</varname></term>
+        <listitem><para>The interval at which the current time is periodically saved to disk, in the absence
+        of any recent synchronisation from an NTP server. This is especially useful for offline systems
+        with no local RTC, as it will guarantee that the system clock remains roughly monotonic across
+        reboots.</para>
+
+        <para>Takes a time interval value. The default unit is seconds, but other units may be specified, see
+        <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+        Defaults to 60 seconds.</para>
+
+        <xi:include href="version-info.xml" xpointer="v250"/></listitem>
+      </varlistentry>
+
+    </variablelist>
+  </refsect1>
+
+  <refsect1>
+      <title>See Also</title>
+      <para>
+      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+      </para>
+  </refsect1>
+
+</refentry>